Recent content by Clark Magnuson

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    How many Amp turns around the Earth for this flux density?

    Someone is asking me how much current in a loop of wire the diameter of the Earth to make the same level of magnetism the Earth has? I hope I am asking this correctly. TIA Clark
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    Can Smaller Rockets with Less Fuel Mass Lower the Cost of Space Travel?

    I was loaned out to Rocket Research a couple of times; Midgetman Missile proposal and ArcJet development. They had high overhead, but the ceilings were not as high as at the Boeing development center.
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    Finding output voltage given two resistances and voltages

    There is an output. Connect to ground with a 108 Ohm resistor and measure 9.6 Volts across the resistor. Connect to ground with a 10 Ohm resistor and see 2.3 Volts. We are going to solve for the thevenin equivalent output open circuit Voltage and the source impedance. 9.6 V= Vo 108 / 108 + Ro...
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    YOU: Fix the US Energy Crisis

    My brother in Montana lives across the street from an old folks home that has a coal fired boiler. When you smell the exhaust, if it does not kill you, it will make you wish you were dead:(
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    YOU: Fix the US Energy Crisis

    We built a super insulated solar home in 1982, tried to recycle everything privately, and tried to raise all our own food organically. I did power conversion [designed power supplies and battery chargers] for a living for 30 years. After so much of my hobby time went into "alternative energy"...
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    Does a battery exert energy keeping a capacitor charged?

    I never designed capacitors other than ones I did not want. That was the 10pF /foot of parallel wires or traces. Multiply by 2pi for coax shield. I have anecdotes from designing with commercial capacitors. Some of the things we look at are: 1) ESL effective series inductance. The leads or wires...
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    Does a battery exert energy keeping a capacitor charged?

    IIRC Lithium batteries leak less than Aluminum electrolytics, but other than that, batteries self discharge more than capacitors leak. After 30 years of designing battery chargers and power supplies for many companies, and reading the customer like I was playing poker, it seemed that a circuit...
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    What could have caused an EMI Filter Bead shorted by itself?

    That is a 5 mOhm 5 amp single turn balun made of Copper and Ferrite. It it shorted out, that must be an isolation test with an Ohm meter. No debris could represent a short that would shut down that kind of power line. My guess would be contaminated part or board or the part was damaged when...
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    B Gravity of the Earth decreases if it stops spinning?

    The rotational energy 1/2 I w^2 is equal to some additional Earth mass. My seat of the pants guess is that is tiny when pushed through the E= mc^2 formula. Whereas the centrifugal force closer to the equator is significant and is half of why we launch rockets from our Southern border.
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    Can Algebra Help Design Better Electronic Power Supplies and Battery Chargers?

    I designed electronic power supplies, magnetics, and battery chargers for 30 years. That takes a lot of algebra calculating Voltage, Current, Power, and temperature. Now I am an old man with time on my hands.
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